THE REGIONAL MUNICIPALITY OF PEEL
STANDARD SPECIFICATION
FOR
CONCRETE NOISE BARRIER WALLS
July 2009
Vol-2.6
Document Reviewed July 2009
STANDARD SPECIFICATION
FOR
PRECAST CONCRETE NOISE BARRIER WALLS
1
2
PART 1: GENERAL ..........................................................................................................1
1.1
General ......................................................................................................................1
1.2
Scope.........................................................................................................................1
1.3
Definitions .................................................................................................................1
1.4
Reference Standards, Specifications and Codes ..................................................2
1.5
Pre-Qualification of Suppliers .................................................................................2
1.6
Submittals .................................................................................................................3
1.7
Quality Assurance ....................................................................................................3
1.8
Delivery, Handling, Storage and Protection ...........................................................3
PART 2: PRODUCTS........................................................................................................4
2.1
Design Requirements...............................................................................................4
2.1.1
2.1.2
2.1.3
2.2
Material Specifications.............................................................................................5
2.2.1
2.2.2
2.2.3
2.2.4
2.3
Concrete for Precast Panels and Posts...........................................................5
Concrete for Foundation...................................................................................5
Reinforcing Steel...............................................................................................5
Structural Steel..................................................................................................6
Manufacture and Testing of Precast Concrete Components................................6
2.3.1
2.3.2
3
Acoustic Characteristics ..................................................................................4
Aesthetic Requirements: ..................................................................................4
Structural Design Criteria .................................................................................4
Manufacture of Precast Concrete Components .............................................6
Inspection and Testing of Precast Concrete Components............................6
PART 3: EXECUTION.......................................................................................................8
3.1
Site Preparation and Grading ..................................................................................8
3.2
Foundations ..............................................................................................................8
3.3
Erection of Walls ......................................................................................................9
3.4
Clean Up..................................................................................................................10
3.5
Certification of the Wall Installation and Performance Acceptance ..................10
3.6
Guarantee an Maintenance Period........................................................................10
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Page- 1 PART 1:
1.1
GENERAL
General
This specification shall be read in conjunction with other related Contract
Document requirements including the General Conditions, Information for
tenders and Special Provisions.
1.2
Scope
This Specification covers the requirements for materials, design, fabrication and
construction of noise barrier wall systems utilizing precast concrete panels.
1.3
Definitions
Whenever used in this Specification, the following terms shall have meanings as
defined herunder:
•
Municipality shall mean the Municipal jurisdiction of the abutting road. Or in
the case of a wall adjacent to a railway it shall mean the local Municipal
jurisdiction:
•
Peel Noise Wall Technical Committee shall mean the committee established
by the Region of Peel, City of Mississauga and the City of Brampton for the
purpose of developing, administering, and maintaining uniform standards
and specifications applicable to the design and construction of noise barrier
walls in all three Municipal jurisdictions.
•
Supplier shall mean the manufacturer of the precast concrete wall
components;
•
Project Proponent shall mean Subdivision or Site Plan Developer obligated
under a Development Agreement with the Municipality to construct a noise
barrier wall on his property.
•
Engineer or Consulting Engineer shall mean the Consulting Engineer or the
Consulting Engineering firm engaged by the Supplier or Project Proponent to
design and certify the precast concrete noise barrier wall. The Consulting
Engineer shall have documented experience in the design and construction
review of Structural Engineering Projects:
•
Contractor shall mean the party undertaking the installation of the precast
concrete noise barrier walls.
PRECAST CONCRETE NOISE BARRIER WALLS
Page- 2-
1.4
Reference Standards, Specifications and Codes
This Specification refers to the following Standards, Specifications and Codes:
CSA-A23.1-94:
CSA-A23.2-94:
CSA-A23.3-94:
CSA-A23.4-94:
CSA-S16.1-94:
CSA-G40.21-91:
CSA-G164-92
Articles:
Ontario Highway Bridge
Design Code (OHBDC). 1991
Ontario Building Code, 1990
OPSS 1352:
OPSS 1442:
Concrete
1.5
Concrete Materials and Methods of Concrete
Construction
Methods of Test for Concrete
Design of Concrete Structures
Precast Concrete – Materials and Construction
Limit States Design of Steel Structures
Structural Quality Steels
Hot Dipped Galvanizing of Irregularity Shaped
Precast Concrete Barriers
Epoxy Coated Steel Reinforcement for
Pre-Qualification of Suppliers
The supply of Precast concrete components will be limited only to Suppliers
who are pre-qualified by the Peel Noise Wall Technical Committee. In order for
the Supplier to be considered for pre-qualification, the Supplier shall submit to
the Peel Noise Wall technical Committee the following documentation:
•
•
•
•
•
•
•
Vol-2.6
The Supplier’s name and address, including the manufacturing plant
location(s);
A resume of the Supplier’s experience in manufacturing precast concrete
wall panels and a listing of completed projects in the region of Peel;
The trade name of the product:
A general statement as to the composition of the product and method of
production;
Detailed Material Specifications;
Quality control program detailing procedures for manufacture, inspection,
testing, shipping and handling;
A Report from an independent Testing Company signed and sealed by a
Professional Engineer licensed by the Professional Engineers of Ontario
and dated within six (6) months of the submission date, certifying that
samples tested from a normal production lot compiled with the
requirements specified in Section 2.2 of this Specification.
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PRECAST CONCRETE NOISE BARRIER WALLS
Page- 3Upon review of the documentation as submitted, the Peel Noise Wall Technical
Committee will pre-qualify the Supplier, or, if the documentation is considered
not to be satisfactory the Peel Noise Wall Technical Committee will advise the
Supplier of the deficiencies. Pre-qualification of the supplier does not imply
subsequent acceptance of the product which shall be subject to project specific
testing as outlined in Section 2.3 herein. Unless otherwise notified, Supplier’s
pre-qualification status will be renewed on an annual basis by the Peel Noise
Wall Committee. If the Supplier’s pre-qualified status is not renewed the
supplier may re-apply for pre-qualification
1.6
Submittals
The following documents shall be submitted to the Municipality for approval for
each noise barrier wall project:
(i)
Shop drawings, signed and sealed by a Professional Engineer licensed
by the Professional Engineers of Ontario (with documented experience in
Structural Engineering Design), showing details of noise barrier wall
components including materials specifications and reinforcing:
(ii)
Structural drawings(s), signed and sealed by a Professional Engineer
licensed by the Professional Engineers of Ontario ( with documented
experience in Structural Engineering Design), showing foundation entails
and specifying design criteria, climatic design loads, as well as applicable
geotechnical data used in the design.
(iii)
Layout plan and wall elevations showing proposed colours and patterns.
Note: A Geotechnical Report on foundation conditions specific to the wall
location including recommendations on soil bearing and lateral resistance will be
made available to the Supplier.
1.7
Quality Assurance
Inspection and testing for quality assurance during manufacture and installation
shall comply with the requirements specified in Section 2.3.2 and 3.2 herein.
1.8
Delivery, Handling, Storage and Protection
Handle, transport and store wall components to meet specified requirements of
CSA Standard A23.4 and to prevent damage, soiling and staining.
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Page- 42
2.1
PART 2: PRODUCTS
Design Requirements
2.1.1 Acoustic Characteristics
The acoustic properties of the wall panels shall comply with the requirements of
the approved Noise Study, if applicable, and unless otherwise specified, the
density of the wall panels shall not be less than 20 kg/m2.
2.1.2 Aesthetic Requirements:
The following requirements shall apply:
(i)
No material other than concrete shall be visible on the public street side of the
wall;
(ii)
Except for steel posts (where used), no material other than concrete shall be
visible on the non-public street side of the wall:
(iii)
A patterned finish shall be provided on both sides of the wall panels;
(iv)
All exposed concrete components shall be manufactured with an impregnated
colour except where accents are permitted in natural grey.
2.1.3 Structural Design Criteria
Noise barrier wall systems shall be designed as a slender structure in accordance with
the requirements of Clause 5-7 of the Ontario Highway Bridge Design Code (OHBDC)
and to support the applicable dead loads, wind and ice accretion loads. Climatic
design data shall be in accordance with Appendix A2-1 of OHBDC with a reference
wind pressure based on a 25 year return period. Wind pressures shall be calculated in
accordance with Appendix A2-2 of OHBDC.
Structural Design of noise barrier walls shall comply with CSA Standards A23-1, A23.4
and S16.1 as applicable. The design of foundations shall comply with Section 4.2 of
the Ontario Building Code.
Particular care shall be given to the design and detailing of the end bearing supports
for the lowest wall panels. Where steel posts are utilized, a galvanized steel bracket
shall be provided. Where precast concrete posts are utilized, a galvanized steel
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PRECAST CONCRETE NOISE BARRIER WALLS
Page- 5bracket shall be provided or the footing concrete shall be extended (formed and
reinforced to provide a satisfactory bearing surface) to the appropriate elevation.
The recommendations of the Geotechnical Report shall be adhered to in the design of
foundations. In particular, the extent of compaction and future consolidation of earth
embankments or berms shall be considered. Where footings are to be installed in an
embankment condition, the embedment depth shall be increased to reflect the
reduction in lateral restraint as determined by the Geotechnical Engineer, as well as
the bearing capacity of the fill.
2.2
Material Specifications
2.2.1 Concrete for Precast Panels and Posts
Materials and production of concrete shall comply with CSA Standards A23.1 and
A23.4, Specific requirements for this specification shall be as follows:
Class of concrete:
Course Aggregate:
(crushed stone)
Water Cement Ratio:
Air Content:
Resistance to Salt Scaling:
35 MPa at 28 days (minimum)
20 mm nominal maximum
size
0.4 (maximum)
5 to 8%
Loss of Mass not to exceed 0.8 Kg/m2
from the surface after 50 cycels of
freezing and thawing when tested in
accordance with OPSS 1352.
Water Absorption:
5% (when tested in accordance with
CSA A23.2
Concrete to Reinforcing Steel Bond Stress:
Mpa (Ultimate)
2.2.2 Concrete for Foundation
Materials and production of concrete shall comply with CSA A23.1. Specific
requirements for this Specification shall be as follows:
Class of Concrete
Water Cement Ratio:
Air Content:
30 Mpa at 28 days (minimum)
0.5 (maximum)
5 to 8%
2.2.3 Reinforcing Steel
Reinforcing steel shall conform to the requirements of CSA Standard G30.12 for
grades 350 and 400 and to CSA Standard G30.16 for grade 400W. Reinforcing
steel shall be epoxy coated for precast concrete panels, conforming to OPSS
1442. Epoxy coated reinforcing steel shall be supplied from an approved
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Page- 6source listed in the current version of the Ontario Ministry of Transportation
Designated Sources Manual DSM #9.65.70.
2.2.4 Structural Steel
Structural Steel materials, design and fabrication shall conform to CAN/CSA
Standard G40.21-92 Grade 300W and CAN/CSA-S16.1 All members shall be
hot dipped galvanized conforming to CAN/CSA-G164.
2.3
Manufacture and Testing of Precast Concrete Components
2.3.1 Manufacture of Precast Concrete Components
Manufacture of precast concrete components shall conform to CSA A23.4.
Concrete cover to reinforcing steel shall be 50 mm (tolerance of ± 5 mm) in
other locations. The concrete cover may be reduced to 30mm (tolerance of ±
5 mm) on the non-road side provided the slides of the pre-cast concrete
components are appropriately marked so that the correct placement
orientation can be easily verified on site. The method of demarcation shall be
agreed to with the Municipality before manufacturing is commenced.
2.3.2 Inspection and Testing of Precast Concrete Components
Precast concrete components manufactured for use on a Municipal project
shall be inspected and tested by an Independent Testing Company engaged
by the Municipality. Precast concrete components manufactured for use on a
non-Municipal project (e.g. Subdivision) shall be inspected and tested by an
Independent Testing Company engaged by the Project Proponent. The
selection of sample components for testing shall be made by the Independent
Testing Company in conjunction with a representative of the Municipality.
Random samples shall be taken from manufactured components in the plant
and/or from components delivered on site. The precast concrete Supplier will
be responsible for notifying the Municipality when the components are ready
for inspection and the Supplier shall provide free and ready access to
facilitate the inspection and testing to be carried out.
The tests to be carried out shall include but shall not be limited to:
•
•
•
•
•
•
Comprehensive strength
Absorption and Density:
Air Void Content:
Concrete Cover:
Dimensions, straightness and finish:
Bond Stress (concrete to reinforcing).
The report of the Testing Company shall be signed and sealed by a
professional Engineer licensed by the Professional Engineers of Ontario.
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Page- 7If any precast components fail to meet the requirements of this Specification,
all units represented by the failed test(s) shall be deemed rejected unless
results of additional testing prove to be satisfactory as determined by the
Municipality. Acceptance by the Municipality of satisfactory test results does
not relieve the Supplier of his responsibility for performance of the product
under the Guarantee.
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Page- 83
3.1
PART 3: EXECUTION
Site Preparation and Grading
3.1.1Prior to installation of the wall, the surrounding area shall be graded to
within 50mm of the specified final grade. Where the subgrade has been
filled, certification of acceptability by a Geotechnical Engineer shall be
submitted to the Municipality for approval before wall installation is
commenced.
3.1.2Final grading shall be completed to provide a minimum of cover of 50mm to
the base of the wall panels. The earth and/or pavement shall be sloped
away from the wall at a minimum slope of 2% and a maximum of 25% for a
distance of 500mm. All earth fill shall be compacted to a minimum of 95%
Standard Proctor Density.
3.1.3Where stepping is required to accommodate changes in vertical alignment,
the stepping shall occur at the posts and the difference in elevation shall be
graded at a maximum of 3;1 with the higher elevation extending a minimum
of 150 mm beyond the post to ensure that there are no gaps under the wall.
3.2
Foundations
3.2.1Concrete for drilled footings shall be cast against undisturbed soil except for
the top 600 mm which shall be formed by sonotube.
If the other than drilled footings are used, the footings shall be formed for a
minimum height of 1200mm, and the excavation shall be subsequently
backfilled with granular materials compacted to 98% Standard Protocol
Density.
Where required, mass concrete (15 MPa) shall be used to raise the base of
the footing to the required level. The tops of all footings shall be sloped
away from the post to avoid ponding of water except for the bearing area of
the wall panels which shall be constructed as designed and shown on the
approved drawing(s).
3.2.2The founding elevations of the foundations shall be verified by the
Geotechnical Engineer based on an inspection of the site conditions before
concrete is placed and shall in all cases provide frost protection to the
approved finished grade in conformity with the Ontario Building Code. A
written Report shall be provided by the Geotechnical Engineer confirming
the acceptability of the foundation bearing conditions.
3.2.3Concrete used in the foundation shall be tested by an Independent Testing
Company engaged by the Consulting Engineer or Municipality for
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Page- 9compliance with the Specification. A copy of the Test Report(s) shall be
provided to the Municipality.
If the test results fail to meet the requirements of the Specification, the work
represented by the failed test(s) shall be deemed rejected unless the results
of additional testing prove to be satisfactory as determined by the
Municipality.
3.2.4The concrete in the footings shall be allowed to cure for a minimum of 7
days before the wall panels are installed. Acceptability of a 7 day concrete
test shall be obtained before wall panel erection commences.
3.3
Erection of Walls
3.3.1The walls shall be constructed to the height and alignment as approved by
the Municipality. The constructed height shall be within 50mm of the
specified height5, and posts and wall panels shall be level and plumb within
tolerance of 6mm in 1m.
3.3.2Where stepping is required to accommodate grade changes, the steps
between panels shall be at even increments and shall be not less than
50mm nor greater than 150 mm, except as authorized by the Municipality.
3.3.3The lowest wall panel or beam shall bear on level bearing surface designed
for applicable shear forces, and as shown on the shop drawings. The use
of galvanized steel shims for levelling shall only be used with the approval of
the Engineer. If shims are used, a non-shrink grout (Masterflow 713 by
Master Builders or approved equal) may be required to provide an
acceptable bearing condition as determined by the Municipality.
3.3.4All components shall have a snug fit with a permitted lateral tolerance of
3mm and a 10 mm longitude tolerance between panels and posts.
3.3.5Components which are damaged upon delivery on site, during installation,
or are otherwise visibly defective shall not be used and shall be disposed of
offsite.
3.3.6All field welds shall conform to CSA Standards W47.1 and W59.
3.3.7Galvanized surfaces which are damaged shall be cleaned and painted with
an organic zinc-rich paint conforming to the requirements of CGSB
Standard 1-GP181-M and to match the colour of the surrounding surfaces.
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Page- 103.4
Clean Up
3.4.1Soil, concrete, or other materials shall be removed from the exposed wall
surfaces to the satisfaction of the Municipality.
3.4.2The site shall be cleared of all debris resulting from the wall insulation.
3.5
Certification of the Wall Installation and Performance Acceptance
3.5.1Prior to performance Acceptance, the Consulting Engineer shall submit the
following documentation to the Municipality.
•
•
•
•
One (1) set of As-Built prints marked up to show changes made
during construction;
A digital file in Microstation format and Mylar copies of the AsConstructed drawings (as stipulated by the Municipality);
Copies of Field Test Reports including foundation, compaction, and
concrete testing;
Certification letter, certifying that the wall has been constructed in
accordance with approved drawings
3.5.2Upon Receipt of the documentation referred to in 3.5.1, the Municipality will
inspect the work and, if acceptable grant Performance Acceptance subject
to the reflection of any deficiencies identified by the Municipality.
3.6
Guarantee a Maintenance Period
3.6.1The wall shall be guaranteed for a period of three (3) years from the date of
Performance Acceptance. At the termination of the Maintenance Period an
inspection will be carried out by the Consulting Engineer and the
Municipality. Any wall components which exhibit defects that are likely to
affect the longevity of the wall (such as cracking, spalling or other visible
defects) shall be replaced. The tolerance for plumbness and levelness shall
be 8mm per metre.
3.6.2Defects identified by the Consulting Engineer and /or Municipality shall be
rectified to the satisfaction of the Municipality prior to Final Acceptance
being issued
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